Steam generator



Feb. 26,1929. l Y 1,703,565

` s, ANDERsoN STEAM GENERATOR Filed June 25, 1927 3 Sheets-Sheet 1 S. ANDERSON STEAM GENERATOR fd. 26, 1929.A 1,703,565

Filed June 2s, 1927 5 sham-sheet 2 p3.; Il l J0 Patented Feb. 26, 1929.

Unirse STATES SWAN ANDERSON, OF MINNEAPOLIS, lllllNNESO'liLy STEAM GENERATOR.

Application led June 28, 1927. Serial No. 200,813.

The object of this invention is to provide an eflicient steam and hot water generator of novel and. improved construction which will rapidly heat hot water to generate steam under pressure by use of a minimum amount of heat.

It is more specifically the object of this invention to provide certain improvements on my steam generator patented by me on October 14, 1919, Patent No. 1,318,825.

With these and other objects in view, my

invention consists in the novel parts and rows, and,

Fig. 4 is a vertical section taken on the line 4-4 of Fig. 2, as indicated by the arrows.

Referring to thedrawings, a base 5 is illustrated forming four leg pedestals spaced apart from each other, disposed in substantially rectangular arrangement and having outer sides and a bottom connecting the same. testing on top of the pedestals are two hollow front legs 6 and 7, and two hollow lrear legs 8 and 9. 1 The said legs extend vertically upwardly from base 5 and are so spaced in respect to each other as to form corners ot' a rectangle. The two rear legs 8 and 9 are cut away at their facing sides to receive the ends of a casting 10 which is secured to said legs and extends between the same at the back of the generator. The casting 10 is preferably cored out to forma series of horizontal ducts 11 situated one on top of another, each duct being of substantially square shape in vertical cross section and the various ducts being arranged in stepped relation to one another so that they slant forwardly and upwardly from their rear edges. Facing sides of the front legs 6 and 7 are out away to receive the ends of a casting 12, which is secured to saidl legs and eX-` tends between the same at the front of the generator. Casting 12 has a plurality of ducts 13 hereinafter termed V-shaped ducts vwardly from their rear e ges.

formed therein preferably by coring out the casting. The ducts 13 'are of substantially square shape in vertical transverse cross section, while they are of substantially V-shape in vertical longitudinal cross section, the pointed portion of the V being centrally and downwardly disposed inthe casting. The various V-shaped ducts 13 are formed one on top of each other in stepped relation and they alsoare inclined u wardly and for- A plurality of sets of tubes 14 extend between and connect the horizontall ducts 11 with the V- shaped ducts 15,the said tubes having their rear ends secured in a plurality of openings formed in the forward sides of ducts 11 and having their forward ends secured in aplurality of openings formed in the rear sides of ducts 13. The V-shaped ducts 12 are disposed at a higher level than` the horizontal ducts 11 and, accordingly, the various tubes 14 are inclined upwardly and forwardly from f their rear ends. Each setof tubes .preferably forms two rows of 'tubes 14 which eX- tend between one of the horizontal ducts and one of the V-shaped ducts, and the ytubes in each row are horizontally alined at their ends connected to the horizontal ducts 11 while the tubes in each row are arranged in V-formation at their ends connected to the V-shaped ducts 13. The horizontal ducts 11 communicate with the rear legs 8 and 9, the tubes 14 afford communication between respective horizontal ducts 11 and V-shaped ducts 13, while the V-shaped ducts 13 vcom municate with the front legs 6 and 7. It will be understood thatthe number of ducts 11` and 13, the number of sets of tubes 14, the number of rows of tubes in each setand the number of tubes in each row may be varied as desired.

A series vof rearwardly projecting steps 15 are provided in the Vfront legs 6,and 7 adjacent their top ends to form a plurality of expansion chambers of graduatingly greater size toward the tops of the legs 6 and 7. The front legs 6 and 7 on the sides facing the rear legs'8 and 9 respectively are bossed up at spaced points adjacent their upper ends and the bossed portions are apertured to receive the `forward ends of .av

series of horizontally disposed tubes'16, 17 L 18 and'19. One of the bosses is formed in each of the legs 6 and 7 on each step 15. Respective tubes 16, 17, 18 and 19 extend rearwardly between the leg 6 and leg 8 and between leg 7 and leg 9 respectively, at the sides of the generator,and the said tubes are secured at their ends in spaced bessed` openings formed in the legs 8 and 9 adjacent their upper ends. The pipes 16, 17, 18 and 19 will afford communication between the front and rear legs. It will be understood that the number of steps 15 and the number of tubes 16, 17 18 and 19 or corresponding tubes can be varied aes-desired. A dome 20 forming a steam chamber is secured to the upper ends of the various legs 6, 7, 8' and 9 by means of bolts 21 screwed inv threaded bolt holes in the tops of the legs and the said legs communicate through apertures 20"L at` the corners of said dome with the interior of the dome. The dome 20 has a substantially horizontal top portion and is provided with. an upwardly andi centrally beveled bottom portion extending centrally from. the inner sides'of said legs. A plurality of vertical posts 22 are provided between the top and bottom portionsv of dome 20 at spaced intervals to'hrace and strengthen the dome. An outlet/"conduity 28y is secured in a central apertured boss` at the top of dome 2O and thel said conduit leads off to oneside of the dome.`

The various ducts 11 and 18 are provided with threaded apertures 11u and 13L respectively at their outer sides facing the openings formed' therein to receive the ends of the various tubes 14, and the said apertures are closed by threaded plugs 241- which are formed tofreceive a wrench to screwA the same tightly in place within the` apertures'. rlhe said apertures 11EL and 131 are of considerably greater diameter than'the diameter of the pipes 14, whereby tools may be inserted through the apertures for sw-aging the' endsof the tubes 14' to theinner sides of the various ducts or for insertion-or removal of the various tubes. Similar threadedA open-- ings are provided in the outer sides of the various legs 6,y 7, 8 and 9 and facing the openings receiving. the' ends of the various tubes 1`6, 17, 18 'and' 19 for reception of threaded plugs 25, The said openings are .of greater diameter than the diameter of the tubes 16, 17, 18 and 19, whereby by remo'val of tlieplugs E25/tools may be inserted through the variousplug apertures for swag ing the ends of the tubes 16, 17, 18 and 19 or for insertion or removal of the various tubes. Inlet conduits 281 are secured in bossed openings adjacent the bottoms of legs Sand 9'at the'rear'sides thereof for the admission of cold water to thegenerator.

A substantially rectangular casing 27 is provided which fitson tog of the base and houses th generator. The casing is rearwardly offset? adjacent itsV top end at the rear side thereof at 28 to form an air pas sage leading from the interior portion ofl the generator between the various legs, to the top of the casing. The upper end of the casing 27 is spaced some little distance above the dome 20 of the generator and is provided with an upwardly extending flange 29`at its cent'erto which a discharge flue 30 connected. Suitable apertures are provided in the casing 27 through which the offtale conduits-23 may extend, while in the embodiment shown, the casing is provided with apertures through which the plugs 25 in the front legs 6 and 7 may eX- tend. Doors 81 may be provided at the front ofthe casing for access to heating means (not shown) whichis adapted to be placed within the base 5.

A plurality of deflect-or plates 32 and 83 areprovided which rest on top of the various sets of tubes- 14 and are secured thereto in staggered relation to produce a circuitous circulation of'y hot air fromthe lower tubes tothe top; tubes. The plates 82 rest on alternate sets of tubes 1lV and extend from'the forward sides of ducts 11 forwardly past the center of the generator. The

plates 83 rest on alternate sets of tubes 14:

from the tubes on whichplates: 32 rest and extend fromtherear sides of alternate ducts `13 rearwardly past the center of thegenerator. rlhe plates 32 and are alternately arranged in respect to each other oni the various sets of tubes 14 and the' plates are sh 'ped'l to Contact thel top surfaces of the various tubes 14 upon which they'rest. .The rear ends of plates 82, accordingly,.will be substantially straight while their forward ends will be V-shaped. Plates 38 will bepronounceably V-shapedf at their forward ends and will be less pronounceably Vlshaped at their rear ends. Preferably no plate is placed on top of the uppermost set of tubes 14.

In practice, a burner orother heatingdevice will be situated within the outline of the casing 27 below the generator and water admitted through inlet 28 will be maintained in the generator 'to .stand at a level slightly below the tops ofi the various legs. Due to the construction of the various plates 32 and 38,hot gases from the burner will follow aE tortuouspath around the various tubes 14 as indicatedlby they arrows, Fig. 2. Also due to the V-shaped construction of the major portions of the plates 82 and the hot air will be deliectedoutwardly tothe sidertubes: 14 of the generator causing the heat from the burner which naturally is greatest at the center of the generator, to be distributedl evenly around all the various tubes.l Tater admitted to the rear legs 8 and 9 will circulate from the said legsl to the ducts 11 and thence 'through the varioustubes 1dto the ducts Due to the fact that the tubes 14 slant upwardly from their rear endsI to their forward ends, the ei;-

pansion of the water in the tubes, as the same are heated, will cause the water to seek a higher level thereby creating a continuous forward circulation of water and' steam through the tubes. Due to the V-arrangement of the forward ends of the tubes 14, some of the water and steam generated thereby will be discharged at lower points in the ducts 13 than other water and steam. The V-shapeoithe ducts 13 will cause the water and steam to circulate from the central or pointed portions of the ducts sidewardly to the front legs 6 and 7, inasmuch as the ends of the ducts will be at a higher vertical level than the central portions thereof. There will thus be a continuous circulation or' water through the tubes and through the various ducts 11 and 13 and, accordingly, any condensation ot solid material caused from heating the water will not remain in the tubes 14 to cause the same to become clogged. The water and steam after circulating to the front legs 6 and 7 will rise upwardly therein to the to s therei of, whereupon the various successive y larger chambers formed by the step construction 15 at the tops of the forward legs will provide plentyot' room to take care or the expansion of the water through heating. From the tops of the legs 6 and 7 the steam that is generated will pass upwardly into the chamber formed in the topy dome and thence outwardly through the discharge outlet 23. l/Vater and steam will freely cir-v culate between the front legs 6 and 7 and the rear legs 8 and 9 through the tubes 16, 17, 18, and 19, thereby permitting a continuous circulation of water through the whole generator. Any steam which may accumulate at the tops of legs 8 or 9 may pass readily into the chamber formed in dome 20. The bottom of dome 20 is -upwardly and centrally beveled to permit any condensation of water formed by the steam generated to run down into the various legs. There will thus be no water standing in the dome 20 at thecenter thereof under normal conditions and, accordingly, steam issuing from outlet 23 will be quite dry.

By removal of the casing 27, the various plugs 24 and 25 may be removed to replace or repair the tubes 14 and the tubes 16, 17, 18 and 19. Plugs 34 are preferably provided at the lower forward sides of the legs 6 and 7 and by removal of these plugs and by removal of the` inlet conduits 26 access can be had to the lower interior of the various legs to permit the same to be readily cleaned out. If desired, of course, the generator may be used strictly as a water heater, whereupon in operation the generator will be completely lled with water. It will be understood, that it' desired the legs 8 and 9 may be used as iront legs while the legs 6 and 7 may be used as rear legs. `Also if desired, the various ducts 11k and 13 may be formed as separate units rather than being formed as parts of thevcastings 10 and 12.

Due to the construction ot the generator the same will heat water very rapidly with an expenditure oi a minimum amount of heat and steam will be quickly generated under `high pressure.

The efficiency of the generator has been demonstrated in actual practice.

It will, ot' course, be understood that various changes may be made in the form, details, arrangement and proportions of the various parts without departing. from the scope of the present invention.

What is claimed is:

1. A steam generator having in combination a chamber, means for supplying water to said chamber, a plurality of horizontally disposed ducts leading from said chamber, a pair lof upstanding hollow legs spaced from said ducts andfrom each other, a plurality of ducts of V-shape in longitudinal cross section extending betweenl and connecting said legs kand a plurality yof sets of tubes extending between and connectingsaid horizontal and V-shaped ducts, each set of tubes extending upwardly from a lower horizontal duct to a higher V-shaped duct, and dis- (lzharging means leading from said pair of egs.

2. The structure defined in claim 1, the tubes in each set being arranged in V-forma tion at their ends joining said V-shaped ducts.

3. A steam generator having in combination four hollow legs spaced apart from each other and disposed in substantially rectan gular arrangement, a plurality of substantially horizontally disposed ducts connecting a pair of said legs, a plurality of ducts of substantially V-shape in vertical longitudinal cross section connecting the opposite pair ot legs and a pluralityl of sets of tubes extending between and connecting said horizontal ducts and said V-shaped ducts, each set of tubes extending from a lower horizontal duct to a higher V-shaped duct, and the tubes in each set being arranged in V-relation at their' ends joining said V- shaped ducts.

4. A steam generator having in combination four hollow legs spaced apart from each other and disposed in substantially rectangular arrangement, a plurality of sub stantially horizontally disposed ducts connectingy a pair oit' said legs, a plurality of substantially V-shaped ducts in Vertical longitudinal cross section connecting the op# posite pair of legs, a plurality of sets of tubes extending between and connecting said horizontal ducts and said Veshaped duets7 each set of tubes extending "from a,

lower horizontal duet to e higher l-shaped" duct and the tubes in each set being ai# ranged in V-r'elation at their ends joining Said V-shiped ducts, said last mentioned legs having e, plurality of steps adjacent their top ends projecting outwardly Vary*- ing distances to form expansion chambers of successively enlarged .size toward their top ends and conduits extending between seid steps ory said last mentioned legs to said first mentioned legs.

lntestilnony whereof l' affix my signa-ture.

SWAN ANDERSON.y 

